See The Vanity License Plates That Iowa Denied
There's a great list of vanity plates requests that were denied across the country, and if you search by state, you can have a laugh reading some weird requests. Some you can't believe people would actually have the guts, or stupidity, to ask for. Others you can't understand. And finally, there are a bunch that just make you laugh...(Warning: Some language that reflects the stupidity of people ahead)
governmentattic.org